Home / 80,982.80-121,416.60-31,043.60

Finding the Fourth Proportional to 80,982.80, 121,416.60 and 31,043.60

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Solution

The fourth proportional to 80,982.80, 121,416.60 and 31,043.60 is: 46,543.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,982.80 : 121,416.60 = 31,043.60 : x
  2. Step 2: Convert to fraction form
    80,982.80/121,416.60 = 31,043.60/x
  3. Step 3: Cross multiply
    80,982.80x = 121,416.60 × 31,043.60
  4. Step 4: Simplify right side
    80,982.80x = 3,769,208,363.76
  5. Step 5: Solve for x
    x = 3,769,208,363.76/80,982.80
  6. Step 6: Final answer
    x = 46,543.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.